/* Flow Box
 *
 * GtkFlowBox allows flexible and responsive grids which reflow
 * as needed and support sorting and filtering. The children of
 * a GtkFlowBox are regular widgets
 *
 * The dataset used here has 665 colors.
 */

#include <gtk/gtk.h>
#include <stdlib.h>
#include <string.h>

static void
draw_color (GtkDrawingArea *drawingarea,
            cairo_t        *cr,
            int             width,
            int             height,
            gpointer        data)
{
  const char *color_name = data;
  GdkRGBA rgba;

  if (gdk_rgba_parse (&rgba, color_name))
    {
      gdk_cairo_set_source_rgba (cr, &rgba);
      cairo_paint (cr);
    }
}

static GtkWidget *
color_swatch_new (const char *color)
{
  GtkWidget *button, *area;

  button = gtk_button_new ();
  area = gtk_drawing_area_new ();
  gtk_drawing_area_set_content_width (GTK_DRAWING_AREA (area), 24);
  gtk_drawing_area_set_content_height (GTK_DRAWING_AREA (area), 24);
  gtk_drawing_area_set_draw_func (GTK_DRAWING_AREA (area), draw_color, (gpointer) color, NULL);
  gtk_button_set_child (GTK_BUTTON (button), area);

  return button;
}

GtkWidget *
do_flowbox (GtkWidget *do_widget)
{
  static GtkWidget *window = NULL;
  GtkWidget *scrolled, *flowbox;
  const char *colors[] = {
    "AliceBlue",
    "AntiqueWhite",
    "AntiqueWhite1",
    "AntiqueWhite2",
    "AntiqueWhite3",
    "AntiqueWhite4",
    "aqua",
    "aquamarine",
    "aquamarine1",
    "aquamarine2",
    "aquamarine3",
    "aquamarine4",
    "azure",
    "azure1",
    "azure2",
    "azure3",
    "azure4",
    "beige",
    "bisque",
    "bisque1",
    "bisque2",
    "bisque3",
    "bisque4",
    "black",
    "BlanchedAlmond",
    "blue",
    "blue1",
    "blue2",
    "blue3",
    "blue4",
    "BlueViolet",
    "brown",
    "brown1",
    "brown2",
    "brown3",
    "brown4",
    "burlywood",
    "burlywood1",
    "burlywood2",
    "burlywood3",
    "burlywood4",
    "CadetBlue",
    "CadetBlue1",
    "CadetBlue2",
    "CadetBlue3",
    "CadetBlue4",
    "chartreuse",
    "chartreuse1",
    "chartreuse2",
    "chartreuse3",
    "chartreuse4",
    "chocolate",
    "chocolate1",
    "chocolate2",
    "chocolate3",
    "chocolate4",
    "coral",
    "coral1",
    "coral2",
    "coral3",
    "coral4",
    "CornflowerBlue",
    "cornsilk",
    "cornsilk1",
    "cornsilk2",
    "cornsilk3",
    "cornsilk4",
    "crimson",
    "cyan",
    "cyan1",
    "cyan2",
    "cyan3",
    "cyan4",
    "DarkBlue",
    "DarkCyan",
    "DarkGoldenrod",
    "DarkGoldenrod1",
    "DarkGoldenrod2",
    "DarkGoldenrod3",
    "DarkGoldenrod4",
    "DarkGray",
    "DarkGreen",
    "DarkGrey",
    "DarkKhaki",
    "DarkMagenta",
    "DarkOliveGreen",
    "DarkOliveGreen1",
    "DarkOliveGreen2",
    "DarkOliveGreen3",
    "DarkOliveGreen4",
    "DarkOrange",
    "DarkOrange1",
    "DarkOrange2",
    "DarkOrange3",
    "DarkOrange4",
    "DarkOrchid",
    "DarkOrchid1",
    "DarkOrchid2",
    "DarkOrchid3",
    "DarkOrchid4",
    "DarkRed",
    "DarkSalmon",
    "DarkSeaGreen",
    "DarkSeaGreen1",
    "DarkSeaGreen2",
    "DarkSeaGreen3",
    "DarkSeaGreen4",
    "DarkSlateBlue",
    "DarkSlateGray",
    "DarkSlateGray1",
    "DarkSlateGray2",
    "DarkSlateGray3",
    "DarkSlateGray4",
    "DarkSlateGrey",
    "DarkTurquoise",
    "DarkViolet",
    "DeepPink",
    "DeepPink1",
    "DeepPink2",
    "DeepPink3",
    "DeepPink4",
    "DeepSkyBlue",
    "DeepSkyBlue1",
    "DeepSkyBlue2",
    "DeepSkyBlue3",
    "DeepSkyBlue4",
    "DimGray",
    "DimGrey",
    "DodgerBlue",
    "DodgerBlue1",
    "DodgerBlue2",
    "DodgerBlue3",
    "DodgerBlue4",
    "firebrick",
    "firebrick1",
    "firebrick2",
    "firebrick3",
    "firebrick4",
    "FloralWhite",
    "ForestGreen",
    "fuchsia",
    "gainsboro",
    "GhostWhite",
    "gold",
    "gold1",
    "gold2",
    "gold3",
    "gold4",
    "goldenrod",
    "goldenrod1",
    "goldenrod2",
    "goldenrod3",
    "goldenrod4",
    "gray",
    "gray0",
    "gray1",
    "gray10",
    "gray100",
    "gray11",
    "gray12",
    "gray13",
    "gray14",
    "gray15",
    "gray16",
    "gray17",
    "gray18",
    "gray19",
    "gray2",
    "gray20",
    "gray21",
    "gray22",
    "gray23",
    "gray24",
    "gray25",
    "gray26",
    "gray27",
    "gray28",
    "gray29",
    "gray3",
    "gray30",
    "gray31",
    "gray32",
    "gray33",
    "gray34",
    "gray35",
    "gray36",
    "gray37",
    "gray38",
    "gray39",
    "gray4",
    "gray40",
    "gray41",
    "gray42",
    "gray43",
    "gray44",
    "gray45",
    "gray46",
    "gray47",
    "gray48",
    "gray49",
    "gray5",
    "gray50",
    "gray51",
    "gray52",
    "gray53",
    "gray54",
    "gray55",
    "gray56",
    "gray57",
    "gray58",
    "gray59",
    "gray6",
    "gray60",
    "gray61",
    "gray62",
    "gray63",
    "gray64",
    "gray65",
    "gray66",
    "gray67",
    "gray68",
    "gray69",
    "gray7",
    "gray70",
    "gray71",
    "gray72",
    "gray73",
    "gray74",
    "gray75",
    "gray76",
    "gray77",
    "gray78",
    "gray79",
    "gray8",
    "gray80",
    "gray81",
    "gray82",
    "gray83",
    "gray84",
    "gray85",
    "gray86",
    "gray87",
    "gray88",
    "gray89",
    "gray9",
    "gray90",
    "gray91",
    "gray92",
    "gray93",
    "gray94",
    "gray95",
    "gray96",
    "gray97",
    "gray98",
    "gray99",
    "green",
    "green1",
    "green2",
    "green3",
    "green4",
    "GreenYellow",
    "grey",
    "grey0",
    "grey1",
    "grey10",
    "grey100",
    "grey11",
    "grey12",
    "grey13",
    "grey14",
    "grey15",
    "grey16",
    "grey17",
    "grey18",
    "grey19",
    "grey2",
    "grey20",
    "grey21",
    "grey22",
    "grey23",
    "grey24",
    "grey25",
    "grey26",
    "grey27",
    "grey28",
    "grey29",
    "grey3",
    "grey30",
    "grey31",
    "grey32",
    "grey33",
    "grey34",
    "grey35",
    "grey36",
    "grey37",
    "grey38",
    "grey39",
    "grey4",
    "grey40",
    "grey41",
    "grey42",
    "grey43",
    "grey44",
    "grey45",
    "grey46",
    "grey47",
    "grey48",
    "grey49",
    "grey5",
    "grey50",
    "grey51",
    "grey52",
    "grey53",
    "grey54",
    "grey55",
    "grey56",
    "grey57",
    "grey58",
    "grey59",
    "grey6",
    "grey60",
    "grey61",
    "grey62",
    "grey63",
    "grey64",
    "grey65",
    "grey66",
    "grey67",
    "grey68",
    "grey69",
    "grey7",
    "grey70",
    "grey71",
    "grey72",
    "grey73",
    "grey74",
    "grey75",
    "grey76",
    "grey77",
    "grey78",
    "grey79",
    "grey8",
    "grey80",
    "grey81",
    "grey82",
    "grey83",
    "grey84",
    "grey85",
    "grey86",
    "grey87",
    "grey88",
    "grey89",
    "grey9",
    "grey90",
    "grey91",
    "grey92",
    "grey93",
    "grey94",
    "grey95",
    "grey96",
    "grey97",
    "grey98",
    "grey99",
    "honeydew",
    "honeydew1",
    "honeydew2",
    "honeydew3",
    "honeydew4",
    "HotPink",
    "HotPink1",
    "HotPink2",
    "HotPink3",
    "HotPink4",
    "IndianRed",
    "IndianRed1",
    "IndianRed2",
    "IndianRed3",
    "IndianRed4",
    "indigo",
    "ivory",
    "ivory1",
    "ivory2",
    "ivory3",
    "ivory4",
    "khaki",
    "khaki1",
    "khaki2",
    "khaki3",
    "khaki4",
    "lavender",
    "LavenderBlush",
    "LavenderBlush1",
    "LavenderBlush2",
    "LavenderBlush3",
    "LavenderBlush4",
    "LawnGreen",
    "LemonChiffon",
    "LemonChiffon1",
    "LemonChiffon2",
    "LemonChiffon3",
    "LemonChiffon4",
    "LightBlue",
    "LightBlue1",
    "LightBlue2",
    "LightBlue3",
    "LightBlue4",
    "LightCoral",
    "LightCyan",
    "LightCyan1",
    "LightCyan2",
    "LightCyan3",
    "LightCyan4",
    "LightGoldenrod",
    "LightGoldenrod1",
    "LightGoldenrod2",
    "LightGoldenrod3",
    "LightGoldenrod4",
    "LightGoldenrodYellow",
    "LightGray",
    "LightGreen",
    "LightGrey",
    "LightPink",
    "LightPink1",
    "LightPink2",
    "LightPink3",
    "LightPink4",
    "LightSalmon",
    "LightSalmon1",
    "LightSalmon2",
    "LightSalmon3",
    "LightSalmon4",
    "LightSeaGreen",
    "LightSkyBlue",
    "LightSkyBlue1",
    "LightSkyBlue2",
    "LightSkyBlue3",
    "LightSkyBlue4",
    "LightSlateBlue",
    "LightSlateGray",
    "LightSlateGrey",
    "LightSteelBlue",
    "LightSteelBlue1",
    "LightSteelBlue2",
    "LightSteelBlue3",
    "LightSteelBlue4",
    "LightYellow",
    "LightYellow1",
    "LightYellow2",
    "LightYellow3",
    "LightYellow4",
    "lime",
    "LimeGreen",
    "linen",
    "magenta",
    "magenta1",
    "magenta2",
    "magenta3",
    "magenta4",
    "maroon",
    "maroon1",
    "maroon2",
    "maroon3",
    "maroon4",
    "MediumAquamarine",
    "MediumBlue",
    "MediumOrchid",
    "MediumOrchid1",
    "MediumOrchid2",
    "MediumOrchid3",
    "MediumOrchid4",
    "MediumPurple",
    "MediumPurple1",
    "MediumPurple2",
    "MediumPurple3",
    "MediumPurple4",
    "MediumSeaGreen",
    "MediumSlateBlue",
    "MediumSpringGreen",
    "MediumTurquoise",
    "MediumVioletRed",
    "MidnightBlue",
    "MintCream",
    "MistyRose",
    "MistyRose1",
    "MistyRose2",
    "MistyRose3",
    "MistyRose4",
    "moccasin",
    "NavajoWhite",
    "NavajoWhite1",
    "NavajoWhite2",
    "NavajoWhite3",
    "NavajoWhite4",
    "navy",
    "NavyBlue",
    "OldLace",
    "olive",
    "OliveDrab",
    "OliveDrab1",
    "OliveDrab2",
    "OliveDrab3",
    "OliveDrab4",
    "orange",
    "orange1",
    "orange2",
    "orange3",
    "orange4",
    "OrangeRed",
    "OrangeRed1",
    "OrangeRed2",
    "OrangeRed3",
    "OrangeRed4",
    "orchid",
    "orchid1",
    "orchid2",
    "orchid3",
    "orchid4",
    "PaleGoldenrod",
    "PaleGreen",
    "PaleGreen1",
    "PaleGreen2",
    "PaleGreen3",
    "PaleGreen4",
    "PaleTurquoise",
    "PaleTurquoise1",
    "PaleTurquoise2",
    "PaleTurquoise3",
    "PaleTurquoise4",
    "PaleVioletRed",
    "PaleVioletRed1",
    "PaleVioletRed2",
    "PaleVioletRed3",
    "PaleVioletRed4",
    "PapayaWhip",
    "PeachPuff",
    "PeachPuff1",
    "PeachPuff2",
    "PeachPuff3",
    "PeachPuff4",
    "peru",
    "pink",
    "pink1",
    "pink2",
    "pink3",
    "pink4",
    "plum",
    "plum1",
    "plum2",
    "plum3",
    "plum4",
    "PowderBlue",
    "purple",
    "purple1",
    "purple2",
    "purple3",
    "purple4",
    "red",
    "red1",
    "red2",
    "red3",
    "red4",
    "RosyBrown",
    "RosyBrown1",
    "RosyBrown2",
    "RosyBrown3",
    "RosyBrown4",
    "RoyalBlue",
    "RoyalBlue1",
    "RoyalBlue2",
    "RoyalBlue3",
    "RoyalBlue4",
    "SaddleBrown",
    "salmon",
    "salmon1",
    "salmon2",
    "salmon3",
    "salmon4",
    "SandyBrown",
    "SeaGreen",
    "SeaGreen1",
    "SeaGreen2",
    "SeaGreen3",
    "SeaGreen4",
    "seashell",
    "seashell1",
    "seashell2",
    "seashell3",
    "seashell4",
    "sienna",
    "sienna1",
    "sienna2",
    "sienna3",
    "sienna4",
    "silver",
    "SkyBlue",
    "SkyBlue1",
    "SkyBlue2",
    "SkyBlue3",
    "SkyBlue4",
    "SlateBlue",
    "SlateBlue1",
    "SlateBlue2",
    "SlateBlue3",
    "SlateBlue4",
    "SlateGray",
    "SlateGray1",
    "SlateGray2",
    "SlateGray3",
    "SlateGray4",
    "SlateGrey",
    "snow",
    "snow1",
    "snow2",
    "snow3",
    "snow4",
    "SpringGreen",
    "SpringGreen1",
    "SpringGreen2",
    "SpringGreen3",
    "SpringGreen4",
    "SteelBlue",
    "SteelBlue1",
    "SteelBlue2",
    "SteelBlue3",
    "SteelBlue4",
    "tan",
    "tan1",
    "tan2",
    "tan3",
    "tan4",
    "teal",
    "thistle",
    "thistle1",
    "thistle2",
    "thistle3",
    "thistle4",
    "tomato",
    "tomato1",
    "tomato2",
    "tomato3",
    "tomato4",
    "turquoise",
    "turquoise1",
    "turquoise2",
    "turquoise3",
    "turquoise4",
    "violet",
    "VioletRed",
    "VioletRed1",
    "VioletRed2",
    "VioletRed3",
    "VioletRed4",
    "wheat",
    "wheat1",
    "wheat2",
    "wheat3",
    "wheat4",
    "white",
    "WhiteSmoke",
    "yellow",
    "yellow1",
    "yellow2",
    "yellow3",
    "yellow4",
    "YellowGreen",
    NULL
  };
  int i;

  if (!window)
    {
      window = gtk_window_new ();
      gtk_window_set_display (GTK_WINDOW (window),
                              gtk_widget_get_display (do_widget));
      gtk_window_set_title (GTK_WINDOW (window), "Flow Box");
      gtk_window_set_default_size (GTK_WINDOW (window), 400, 600);
      g_object_add_weak_pointer (G_OBJECT (window), (gpointer *)&window);

      scrolled = gtk_scrolled_window_new ();
      gtk_scrolled_window_set_policy (GTK_SCROLLED_WINDOW (scrolled), GTK_POLICY_NEVER, GTK_POLICY_AUTOMATIC);
      flowbox = gtk_flow_box_new ();
      gtk_widget_set_valign (flowbox, GTK_ALIGN_START);
      gtk_flow_box_set_max_children_per_line (GTK_FLOW_BOX (flowbox), 30);
      gtk_flow_box_set_selection_mode (GTK_FLOW_BOX (flowbox), GTK_SELECTION_NONE);

      gtk_scrolled_window_set_child (GTK_SCROLLED_WINDOW (scrolled), flowbox);
      gtk_window_set_child (GTK_WINDOW (window), scrolled);

      for (i = 0; colors[i]; i++)
        gtk_flow_box_insert (GTK_FLOW_BOX (flowbox), color_swatch_new (colors[i]), -1);
    }

  if (!gtk_widget_get_visible (window))
    gtk_widget_show (window);
  else
    gtk_window_destroy (GTK_WINDOW (window));

  return window;
}
